The season ten finalist took to his Twitter account ahead of tonight's Top 12 performances to confirm media reports that he has ulcerative colitis.

"Just to let every one know, I have ulcerative colitis. I'm always going to have it, but the symptoms are pretty much under control. :) (sic)" he wrote.

He told one follower that he decided to share the information regarding his health because he had been getting questions about the subject.

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Abrams missed last week's results show on Thursday after he was taken to hospital. He was released over the weekend and appeared alongside other finalists at PaleyFest on Monday, where he revealed that he had hoped to make the results show, but ended up watching it on television from the hospital.

Tonight's American Idol will see the Top 12 performing tracks that were released in the year they were born. Abrams added that he is looking forward to returning to the stage, tweeting: "I'm exited for tonight, EVERYONE, I mean it, EVERYONE sounds incredible."

A compilation of the contestants' studio performances and single tracks will be available on iTunes following the show through 19 Recordings/Interscope. Last week's compilation release was a Top 10 bestseller on the iTunes album chart.